How to connect Trunk server to an API server that is using SSL?

[jsoneaday]

I have a csr based leptos server with an actix web api server. The leptos server is written with wasm and uses trunk serve to run the server.
I've enabled ssl on the api server and opened cors to allow my leptos server to access the api. When I test my api using curl, calls seem to work fine. But when I try and call to the api from my leptos server it fails with ERR_CERT_COMMON_NAME_INVALID (the leptos server does not yet have ssl enabled).
I've tried passing the proxy setting to trunk like this, trunk serve --proxy-backend=https://127.0.0.1:4003/v1 --proxy-insecure, but I still get the same error

[ctron]

I am not sure what you mean by "leptos server"? The proxy settings for trunk are for the communication between trunk and the backend. But to my understanding you see an error between the browser and trunk, right?

[jsoneaday]

I'm sorry I thought you were familiar with the Leptos project. Leptos is a rust webassembly server that I'm using and they use Trunk to serve in the dev environment.
But I found my issue. When my Api server had not yet enabled ssl I was using http://0.0.0.0 and that worked fine. However when I switched to enable ssl that ip was not working and I switched to https://127.0.0.1 and this works. I don't know why.